Lets user lock the Inspector window using keyboard shortcut. Note: Does not work for multiple inspector windows!

InspectorLockShortcut.cs

// ----------------------------------------------------------------------------
// Author: Siarhei Pilat
// Site: https://www.suasor-ab.com/
// This gist: https://gist.github.com/SiarheiPilat/b1469fba1b4f5757b10c083e88dbedb2
// Updated: 24 Feb 2021
// ----------------------------------------------------------------------------

using UnityEditor;

/// <summary>
/// Locks the inspector window with a shortcut. Works for a single inspector window. Need to restart the editor for it to work!
/// </summary>

static class InspectorLockShortcut
{
    [MenuItem("Tools/Toggle Inspector lock %l")]
    static void ToggleInspectorLock()
    {
        ActiveEditorTracker.sharedTracker.isLocked = !ActiveEditorTracker.sharedTracker.isLocked;
        ActiveEditorTracker.sharedTracker.ForceRebuild();
    }
}